苏州汽车站订票,银角狰的鬃毛,泰坦尼克号的经典台词
具体代码如下所示:
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//
// authcodeview.h
// bsbracelet
//
// created by christopher on 17/5/16.
// copyright © 2017年 ztracy. all rights reserved.
//
#import <uikit/uikit.h>
@interface authcodeview : uiview
@property (strong, nonatomic) nsarray *dataarray;//字符素材数组
@property (strong, nonatomic) nsmutablestring *authcodestr;//验证码字符串
@end
//
// authcodeview.m
// bsbracelet
//
// created by christopher on 17/5/16.
// copyright © 2017年 ztracy. all rights reserved.
//
#import "authcodeview.h"
#define krandomcolor [uicolor colorwithred:arc4random() % 256 / 256.0 green:arc4random() % 256 / 256.0 blue:arc4random() % 256 / 256.0 alpha:1.0];
#define klinecount 6
#define klinewidth 1.0
#define kcharcount 4
#define kfontsize [uifont systemfontofsize:arc4random() % 5 + 15]
@implementation authcodeview
/*
// only override drawrect: if you perform custom drawing.
// an empty implementation adversely affects performance during animation.
- (void)drawrect:(cgrect)rect {
// drawing code
}
*/
- (instancetype)initwithframe:(cgrect)frame
{
self = [super initwithframe:frame];
if (self)
{
self.layer.cornerradius = 5.0f;
self.layer.maskstobounds = yes;
self.backgroundcolor = krandomcolor;
[self getauthcode];//获得随机验证码
}
return self;
}
#pragma mark 获得随机验证码
- (void)getauthcode
{
//字符串素材
_dataarray = [[nsarray alloc] initwithobjects:@"0",@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",@"i",@"j",@"k",@"l",@"m",@"n",@"o",@"p",@"q",@"r",@"s",@"t",@"u",@"v",@"w",@"x",@"y",@"z",@"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",@"i",@"j",@"k",@"l",@"m",@"n",@"o",@"p",@"q",@"r",@"s",@"t",@"u",@"v",@"w",@"x",@"y",@"z",nil];
_authcodestr = [[nsmutablestring alloc] initwithcapacity:kcharcount];
//随机从数组中选取需要个数的字符串，拼接为验证码字符串
for (int i = 0; i < kcharcount; i++)
{
nsinteger index = arc4random() % (_dataarray.count-1);
nsstring *tempstr = [_dataarray objectatindex:index];
_authcodestr = (nsmutablestring *)[_authcodestr stringbyappendingstring:tempstr];
}
}
#pragma mark 点击界面切换验证码
- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event
{
[self getauthcode];
//setneedsdisplay调用drawrect方法来实现view的绘制
[self setneedsdisplay];
}
- (void)drawrect:(cgrect)rect
{
[super drawrect:rect];
//设置随机背景颜色
self.backgroundcolor = krandomcolor;
//根据要显示的验证码字符串，根据长度，计算每个字符串显示的位置
nsstring *text = [nsstring stringwithformat:@"%@",_authcodestr];
cgsize csize = [@"a" sizewithattributes:@{nsfontattributename:[uifont systemfontofsize:20]}];
int width = rect.size.width/text.length - csize.width;
int height = rect.size.height - csize.height;
cgpoint point;
//依次绘制每一个字符,可以设置显示的每个字符的字体大小、颜色、样式等
float px,py;
for ( int i = 0; i<text.length; i++)
{
px = arc4random() % width + rect.size.width/text.length * i;
py = arc4random() % height;
point = cgpointmake(px, py);
unichar c = [text characteratindex:i];
nsstring *textc = [nsstring stringwithformat:@"%c", c];
[textc drawatpoint:point withattributes:@{nsfontattributename:kfontsize}];
}
//调用drawrect：之前，系统会向栈中压入一个cgcontextref，调用uigraphicsgetcurrentcontext()会取栈顶的cgcontextref
cgcontextref context = uigraphicsgetcurrentcontext();
//设置线条宽度
cgcontextsetlinewidth(context, klinewidth);
//绘制干扰线
for (int i = 0; i < klinecount; i++)
{
uicolor *color = krandomcolor;
cgcontextsetstrokecolorwithcolor(context, color.cgcolor);//设置线条填充色
//设置线的起点
px = arc4random() % (int)rect.size.width;
py = arc4random() % (int)rect.size.height;
cgcontextmovetopoint(context, px, py);
//设置线终点
px = arc4random() % (int)rect.size.width;
py = arc4random() % (int)rect.size.height;
cgcontextaddlinetopoint(context, px, py);
//画线
cgcontextstrokepath(context);
}
}
@end
使用
-(void)recordbtnclick:(uibutton *)recordbtn
{
domodelview = [[uiview alloc]initwithframe:cgrectmake(0,0,kscreenwidth,kscreenheight)];
domodelview.backgroundcolor = [uicolor colorwithred:0.3 green:0.3 blue:0.3 alpha:0.6];
authbgview = [[uiview alloc]initwithframe:cgrectmake(30, 120, self.view.frame.size.width-60, 220)];
authbgview.backgroundcolor = [uicolor whitecolor]; //显示验证码界面
authbgview.layer.cornerradius = 8;
authbgview.layer.maskstobounds = yes;
authcodeview = [[authcodeview alloc] initwithframe:cgrectmake(10, 10, kscreenwidth-80, 45)];
[authbgview addsubview:authcodeview];
//提示文字
uilabel *label = [[uilabel alloc] initwithframe:cgrectmake(10, 65, kscreenwidth-80, 40)];
label.text = @"点击图片换验证码";
label.font = [uifont systemfontofsize:15];
label.textcolor = [uicolor graycolor];
[authbgview addsubview:label];
//添加输入框
_input = [[uitextfield alloc] initwithframe:cgrectmake(10, 120, kscreenwidth-80, 40)];
_input.layer.bordercolor = [uicolor lightgraycolor].cgcolor;
_input.layer.borderwidth = 2.0;
_input.layer.cornerradius = 5.0;
_input.font = [uifont systemfontofsize:21];
_input.placeholder = @"请输入验证码!";
_input.clearbuttonmode = uitextfieldviewmodewhileediting;
_input.backgroundcolor = [uicolor clearcolor];
_input.textalignment = nstextalignmentcenter;
_input.returnkeytype = uireturnkeydone;
_input.delegate = self;
[authbgview addsubview:_input];
uibutton *closebtn = [[uibutton alloc] initwithframe:cgrectmake(10,170, kscreenwidth-80, 40)];
[closebtn addtarget:self action:@selector(removeview) forcontrolevents:uicontroleventtouchupinside];
closebtn.backgroundcolor = rgbcolor(34,151,216);
[closebtn settitle: @"关闭" forstate: uicontrolstatenormal];
[authbgview addsubview:closebtn];
[domodelview addsubview:authbgview];
[self.view addsubview:domodelview];
// invoicerecordviewcontroller *invoicerecordvc = [[invoicerecordviewcontroller alloc] initwithnibname:@"invoicerecordviewcontroller" bundle:nil];
// [self.navigationcontroller pushviewcontroller:invoicerecordvc animated:yes];
}
#pragma mark 输入框代理，点击return 按钮
- (bool)textfieldshouldreturn:(uitextfield *)textfield
{
//判断输入的是否为验证图片中显示的验证码
if([_input.text compare:authcodeview.authcodestr options:nscaseinsensitivesearch |nsnumericsearch] ==nsorderedsame)
{
//正确弹出警告款提示正确
// uialertview *alview = [[uialertview alloc] initwithtitle:@"恭喜您 ^o^" message:@"验证成功" delegate:self cancelbuttontitle:@"ok" otherbuttontitles:nil, nil];
// [alview show];
[domodelview removefromsuperview];
invoicerecordviewcontroller *invoicerecordvc = [[invoicerecordviewcontroller alloc] initwithnibname:@"invoicerecordviewcontroller" bundle:nil];
[self.navigationcontroller pushviewcontroller:invoicerecordvc animated:yes];
}
else
{
//验证不匹配，验证码和输入框抖动
cakeyframeanimation *anim = [cakeyframeanimation animationwithkeypath:@"transform.translation.x"];
anim.repeatcount = 1;
anim.values = @[@-20,@20,@-20];
// [authcodeview.layer addanimation:anim forkey:nil];
[_input.layer addanimation:anim forkey:nil];
}
return yes;
}
总结
以上所述是小编给大家介绍的ios动态验证码实现代码，希望对大家有所帮助
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